._div {
    width: 582px;
    margin: 100px auto;
    position : relative;
}
#keywords {
    width: 500px;
    float: left;
}
#sub{
    float: right;
}
#tipBody{
    border: 1px saddlebrown solid;
    background-color: white;
    width: 500px;
    position: absolute;
z-index: 22;
}
#tipBody td{
    padding:5px;

}
#tipBody td:hover{
    background-color:gray;
}
.absolute_z_index{
    position: absolute;
    left: 5px;
    top: 150px;
    z-index:11;
}
.absolute_z_index2{
    position: absolute;
    left: 25%;
    top: 600px;
    z-index:11;
}
